MAT116Week1DQ1 - the variables Example 4x 10 If x=2 the...

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Daily Question 1: An expression involves variables and terms but one cannot solve for a variable in an expression. Example of an expression is: x+3 An equation involves an equal sign and therefore one can solve for a variable in an equation. Example of an equation is: x+3=6 This is a very important concept to grasp, but it is very simple. An expression is a variable, a number, or a combination of both connected by operation signs, while an equation is two expressions separated by an equal sign which means they are equivalent. The difference between an expression and an equation is in the way they are solved. Precisely, an expression cannot be solved; it only can be evaluated by substituting values for
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Unformatted text preview: the variables. Example: 4x+10 If x=2, the value of the expression is 18, and it changes according to the value of the variable. So, finding the value of an expression, we are looking for the result we get from the expression evaluation which can vary in many ways. An equation though can be solved and there is a single solution to it. Example: 5x+5=10, 5x=10-5, 5x=5, x=5/5, x=1 Only when x equals 1, both parts of the equation become equal. Example for my classmates: Translate. Let x represent the unknown number. Two more than four times a number is the same as six....
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